We had a dry potty in the 421. (I preferred that). The 441 has a flushing potty. It's a 70's unit with some blue fluid for the flush. Anyone know how they come out/ how they're emptied and can we replace it with a dry 'drop in' unit?
It seems like the whole unit should slide out, but I'm not sure and I don't want to break anything.

Most flushing pottys for that style have a cabinet that opens up. You basically have to take three actions:

(1) there should be some sort of knife valve to close off the hole at the bottom of the bowl (which is open to the tank). Should be a lever or bar you slide to close it.
(2) You have to disconnect the water take up line from the tank. Should be a hose which leads from the front of the tank (as you face it) to the pump. It probably connects to the tank with one of those "air hose" style fittings (with a ring you push down to disconnect and release the hose nipple).
(3) you have to disconnect the tank from the assembly. Most have something like two little levers which you flip 90 degrees (not rotate but flip so they alingn).

then you basically slide the tank to you and out of the assembly (it sits on two tracks to align it with the bowl. Take the tank to a bathroom and either open the knife valve or there will be a screw cap in a corner and dump contents in toilet to flush. Service with the appropriate amount of blue juice and you are good to go.

No need to remove it, just tape a heavy duty garbage bag over it and go fly inverted for a couple minutes.

Martti,
Here is a diagram of a typical (in this case Monogram) flushing unit. The "Knife Valve" (#16) is operated by pulling the handle (#14).

If you have questions, GR Lowe is our 11,000+ hour pilot that handles all our flushing and air lav's. You can contact GR regarding anything to do flushing units, at GRlowe@avfab.com or 660.885.8317

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And.....when you reinstall, open the knife valve. ( never attempt when pressurized )

Unless you want to join the Blue Man Group!

What are the part numbers for the two rubber parts, 13 and 21 ? Need to replace those and had been wondering where to find these....

-Pascal

Pascal,

Suspect you have the same unit in your Marquise I have. Was never able to track those down and mine were all aged out. I bought some gasket material for 13. For 21, I bought a cheap garbage disposal drain insert and trimmed it. Note you want one that is just soft plastic flaps...the firmer, more robust modern disposal ones tend to be too rigid, not allowing solid waste to,drop through if you get my drift....

Dave

Potty removed, along with coffee urn. 20 lbs of useful load added! Thanks for all the help. This potty had 2 cam locks on the metal plates on both sides that needed to be loosened in order to remove it.

The dry potty works fine, but a more modern, more sanitary and simpler unit would be nice for the ladies. Anyone install one of these:

http://www.aircrafttech.com/toilet-syst ... et-systems

They tell me these are in PC-12's. Any pireps (lavreps)? I would consider this if the emptying/servicing is easier than the Monogram units. The sales guy tells me they're great....shocker!

~$4200 for model 50

Martti,
We have these as well, G.R. Lowe is our 11,000+ hour pilot and the "go to guy" on cabin-class aircraft lav's. He'd be glad to give you all your options on a new unit vs. overhaul. The pictured unit goes in a Citation.
Contact G.R. at 660.885.8317 or grlowe@avfab.com

Regards,
Jeff Ferguson
http://www.AvFab.com